import _extends from 'babel-runtime/helpers/extends';
import classNames from 'classnames';
import PropTypes from '../_util/vue-types';
import BaseMixin from '../_util/BaseMixin';
import { getStyle } from '../_util/props-util';
import omit from 'omit.js';
import { cloneElement } from '../_util/vnode';
import { ConfigConsumerProps } from '../config-provider';

function getNumberArray(num) {
  return num ? num.toString().split('').reverse().map(function (i) {
    return Number(i);
  }) : [];
}

var ScrollNumberProps = {
  prefixCls: PropTypes.string,
  count: PropTypes.any,
  component: PropTypes.string,
  title: PropTypes.oneOfType([PropTypes.number, PropTypes.string, null]),
  displayComponent: PropTypes.any,
  className: PropTypes.object
};

export default {
  mixins: [BaseMixin],
  props: ScrollNumberProps,
  inject: {
    configProvider: { 'default': function _default() {
        return ConfigConsumerProps;
      } }
  },
  data: function data() {
    return {
      animateStarted: true,
      sCount: this.count
    };
  },

  watch: {
    count: function count(val) {
      var _this = this;

      if (this.sCount !== val) {
        this.lastCount = this.sCount;
        // 复原数字初始位置
        this.setState({
          animateStarted: true
        }, function () {
          // 等待数字位置复原完毕
          // 开始设置完整的数字
          setTimeout(function () {
            _this.setState({
              animateStarted: false,
              sCount: val
            }, function () {
              _this.$emit('animated');
            });
          }, 5);
        });
      }
    }
  },
  methods: {
    getPositionByNum: function getPositionByNum(num, i) {
      if (this.animateStarted) {
        return 10 + num;
      }
      var currentDigit = getNumberArray(this.sCount)[i];
      var lastDigit = getNumberArray(this.lastCount)[i];
      // 同方向则在同一侧切换数字
      if (this.sCount > this.lastCount) {
        if (currentDigit >= lastDigit) {
          return 10 + num;
        }
        return 20 + num;
      }
      if (currentDigit <= lastDigit) {
        return 10 + num;
      }
      return num;
    },
    renderNumberList: function renderNumberList(position) {
      var h = this.$createElement;

      var childrenToReturn = [];
      for (var i = 0; i < 30; i++) {
        var currentClassName = position === i ? 'current' : '';
        childrenToReturn.push(h(
          'p',
          { key: i.toString(), 'class': currentClassName },
          [i % 10]
        ));
      }
      return childrenToReturn;
    },
    renderCurrentNumber: function renderCurrentNumber(prefixCls, num, i) {
      var h = this.$createElement;

      var position = this.getPositionByNum(num, i);
      var removeTransition = this.animateStarted || getNumberArray(this.lastCount)[i] === undefined;
      var style = {
        transition: removeTransition ? 'none' : undefined,
        msTransform: 'translateY(' + -position * 100 + '%)',
        WebkitTransform: 'translateY(' + -position * 100 + '%)',
        transform: 'translateY(' + -position * 100 + '%)'
      };
      return h(
        'span',
        { 'class': prefixCls + '-only', style: style, key: i },
        [this.renderNumberList(position)]
      );
    },
    renderNumberElement: function renderNumberElement(prefixCls) {
      var _this2 = this;

      var sCount = this.sCount;

      if (sCount && Number(sCount) % 1 === 0) {
        return getNumberArray(sCount).map(function (num, i) {
          return _this2.renderCurrentNumber(prefixCls, num, i);
        }).reverse();
      }
      return sCount;
    }
  },

  render: function render() {
    var h = arguments[0];
    var customizePrefixCls = this.prefixCls,
        title = this.title,
        _component = this.component,
        Tag = _component === undefined ? 'sup' : _component,
        displayComponent = this.displayComponent,
        className = this.className;

    var getPrefixCls = this.configProvider.getPrefixCls;
    var prefixCls = getPrefixCls('scroll-number', customizePrefixCls);
    if (displayComponent) {
      return cloneElement(displayComponent, {
        'class': prefixCls + '-custom-component'
      });
    }
    var style = getStyle(this, true);
    // fix https://fb.me/react-unknown-prop
    var restProps = omit(this.$props, ['count', 'component', 'prefixCls', 'displayComponent']);
    var newProps = {
      props: _extends({}, restProps),
      attrs: {
        title: title
      },
      style: style,
      'class': classNames(prefixCls, className)
    };
    // allow specify the border
    // mock border-color by box-shadow for compatible with old usage:
    // <Badge count={4} style={{ backgroundColor: '#fff', color: '#999', borderColor: '#d9d9d9' }} />
    if (style && style.borderColor) {
      newProps.style.boxShadow = '0 0 0 1px ' + style.borderColor + ' inset';
    }

    return h(
      Tag,
      newProps,
      [this.renderNumberElement(prefixCls)]
    );
  }
};